Scania Cv Ab

Alfawall Oceanbird Ab

Fredrik Roos

Oskar Johansson

Maria Södergren

Mikael Ögren

Ola Stenlåås

Oscar Flärdh

Olof Larsson

Elvedin Ramic

Björn Johansson

Martin Evaldsson

Linus Bredberg

Peter Karlsson

Frank Mohr

Henrik Svärd

Georg Åhrberg

Mikael Zemowski

Gustav Norman

Mengxi Wu

Erik Holma

Andreas Fieber

Annika Bengtsson EDSTRÖM

Mikael ÖGren

Oskar LINDSTRÖM

Henrik SVÄRD

A method, performed by a control device, for starting a combustion engine during free-wheeling with engine off is described. The method comprises a step of controlling the clutch to a partially closed state, thereby starting the combustion engine; a step of controlling the clutch to an open state when the combustion engine has started, but prior to the output shaft of the combustion engine has reached a rotational speed synchronized with the rotational speed of the input shaft of the gearbox; and a step of synchronizing the speed of the combustion engine to the speed of the input shaft of the gearbox through control of fuel injection to the combustion engine.

Control device and method for starting a combustion engine during free-wheeling a vehicle with such device, computer program for executing the method and computer readable medium containing the program

A method for determining a reference control profile for a vehicle, including determining (A) a plurality of control profiles for the vehicle () based on topographic information for one and the same future route segment and selecting (A) one of the plurality of control profiles as a reference control profile, the selection (A) being based on a tradeoff criterion considering resource consumption and drivability of the plurality of control profiles. The disclosure also relates to a control arrangement () for determining a reference control profile for a vehicle () and a vehicle comprising the control arrangement ().

Method and a control arrangement for determining a control profile for a vehicle

A method () and control arrangement () for controlling a vehicle () to freewheel with engine off. The vehicle () has an engine () for propelling the vehicle () and a hydraulic power steering system (). The hydraulic power steering system () comprises a primary power steering pump () arranged to be driven by the engine () and a secondary power steering pump (). The method () includes: determining () when to start freewheeling the vehicle () with its engine off; and prior to starting the freewheeling of the vehicle () with engine off, determining () to start the secondary power steering pump ().

Method and control arrangement for controlling vehicle freewheel with engine off and power steering

Methods, systems, and computer program products are provided for control of a combustion engine in a vehicle. At least one future speed profile for an actual speed of the vehicle during a road section is simulated based on information about the road section, and that coasting will be applied during the road section. An applicability for coasting during the road section is evaluated. Subsequently, it is evaluated whether the combustion engine may be shut down during a coasting for at least a part of the road section. The evaluation of the shutdown of the combustion engine is based on whether one or several system conditions for engine shutdown have been met, on one or several properties for one or several brake systems in the vehicle, and on a shutdown period, when the combustion engine could be shut down. The combustion engine is then controlled based on this evaluation.

Control of an combustion engine in a vehicle

The present invention presents a method and a system for the control of preparatory measures during a road section, for at least one system. First, one or several parts of a road section are identified, during which parts one or several engines comprised in the vehicle may be shut down. Such identification is carried out when the road section is ahead of the vehicle, that is to say before the vehicle has entered the road section. The identification is based on available information about the road section. Subsequently it is determined whether at least one preparatory measure for at least one respective system in the vehicle needs to be carried out, in order to facilitate that one or several of the engines may be shut down. Subsequently, the preparatory measures are controlled based on the determination of the need to carry out the at least one preparatory measure.

Control of preparatory measures in a vehicle

Provided is a method for propulsion of a vehicle, said vehicle comprising at least one power source for providing power to at least one drive wheel of said vehicle. The method includes, when said vehicle is to be driven along a first path: determining a torque profile for use in controlling said first power source when driving said vehicle along at least a first segment of said first path; determining said torque profile on the basis of an estimated representation of a demand for torque when driving said vehicle along said first segment; when determining said torque profile, reducing variations in torque delivered by said power source by allowing increased variations in speed of said vehicle; and when said vehicle is driven along said first segment of said first path, controlling torque delivered by said at least one power source according to said determined torque profile.

Method and system for propulsion of a vehicle

A method for regulation of a concentration/fraction of one or several substances comprised in an exhaust system in a motor vehicle through control of its driveline: The driveline includes a combustion engine which may be connected to a gearbox via a clutch device, wherein the gearbox has several discrete gears, and an exhaust system for removal of an exhaust stream from the combustion engine; the method includes obtaining one or several first parameters Prelated to at least one first concentration/fraction C/Xof one or several substances comprised in the exhaust system; and controlling the gearbox, and thus an operating point in the combustion engine, based on the parameters Pfor regulation of a concentration/fraction C/Xof one or several substances in the said exhaust system. Further, a computer program, a computer program product, a system and a motor vehicle comprising such a system are disclosed.

Regulation of concentration/fraction of substances in an exhaust stream

A method for an economical cruise control and an economical cruise control which demands from a vehicle engine system a reference speed v, which may differ from a chosen set speed v. Adjustment of at least the set speed vis allowed when the reference speed vdiffers from the set speed v. The adjustment is based at least partly on input from a user of the economical cruise control. A user of the economical cruise control is thus provided with an increased feeling of control over the vehicle's speed.

Driver interaction pertaining to economical cruise control

Methods and systems are provided for control of a combustion engine in a vehicle. In operation, at least one future speed profile for an actual speed of the vehicle is simulated during a road section ahead based on information about the road section and on knowledge that coasting with the combustion engine shut down will be applied during the road section. Subsequently, based on the future speed profile, a starting point in time is determined, when the combustion engine will need to be started for forward driving the vehicle and/or to brake the vehicle. Subsequently, a starting point brought forward in time is determined based on the need for a forward driving or braking force arising, where the starting point brought forward in time precedes the starting point in time. Subsequently, the combustion engine is controlled to be started at the starting point brought forward in time.

Control of an internal combustion engine in a vehicle

The present invention provides a method and system arranged for control of at least one temperature Tfor an exhaust treatment system in a vehicle. The system comprises a first determination unit arranged for the determination of the at least one temperature Tfor the exhaust treatment system. The system also comprises a second determination unit arranged for the determination of an order of priority for the use of brakes in the vehicle. These brakes comprise at least the service brakes and the auxiliary brakes, the auxiliary brakes in turn comprising at least one engine fitted auxiliary brake, which is fitted in connection with an exhaust stream through the exhaust treatment system. The order of priority is determined based on the at least one temperature T. The system also comprises an utilization unit arranged for the use of the determined order of priority at braking of the vehicle.

Method and system for control of temperature of an exhaust aftertreatment system

A method for regulation of a concentration/fraction of one or several substances in an exhaust stream in a motor vehicle through control of its driveline. The motor vehicle includes a driveline comprising a combustion engine; a driveline comprising a combustion engine connected to a gearbox, and an exhaust system for removal of an exhaust stream from the engine. The method includes the step: controlling the driveline for activation or deactivation of coasting of the vehicle based on one or several first parameters Pfor the regulation of a concentration/fraction CIXof one or several substances Tin the exhaust stream, where at least one of the or several first parameters Pare a first concentration/fraction difference between the first concentration/fraction C/Xin the exhaust stream and a reference concentration/fraction CIX. Further, a computer program, a computer program product, a system and a motor vehicle such a system are disclosed.

A system for control of temperature for a vehicle exhaust treatment system comprising a first determination unit arranged for determination of a temperature for the exhaust treatment system, and a simulation unit arranged for simulation of a future velocity profile, based on information relating to a road section. A second determination unit arranged for determination, based on a future velocity profile, of whether a simulated active brake process due to an over-speed for the vehicle will occur within the road section. A utilization unit is arranged for utilization, if the at least one temperature for the exhaust treatment system is below a minimum temperature threshold value, and if the simulated active brake process is simulated to occur within the road section, of an engine fitted auxiliary brake, which is fitted in connection with an exhaust stream from an engine in the vehicle, where the utilization is initiated before over-speed occurs.

A method for the regulation of a temperature in an exhaust stream in a motor vehicle through control of its driveline: the motor vehicle includes a driveline having a combustion engine, which may be connected to a gearbox via a clutch device, and an exhaust system for removing an exhaust stream from the engine. The method includes controlling the driveline for activation or deactivation of coasting of the vehicle based on one or several first parameters Pand one or several second parameters Pfor regulation of a temperature Tin the exhaust system. At least one of the first parameters Pis a first temperature difference between the first temperature Tin the exhaust system and a reference temperature T. The said second parameter Pis related to a calculated speed and/or a calculated road inclination over the road section ahead for the motor vehicle. Further, a computer program, a computer program product, a system and a motor vehicle including such a system are disclosed.

Regulation of a temperature in an exhaust aftertreatment system

A method and a system for controlling a cruise control and a transmission in a vehicle over the course of a road section, wherein prior to the road section, the vehicle has applied coasting and utilizes the cruise control. A reference speed vutilized in the cruise control during the coasting is lowered to a lowest permitted speed vdefined for the road section if the lowering is deemed applicable. A comparison of a drive force Frequested from an engine system in the vehicle with a threshold value Ffor the drive force is also carried out. The coasting is then suspended if the requested drive force Fexceeds the threshold value Ffor the drive force.

Vehicle speed and coasting control method and system

A method and a system for choosing a transmission mode in a vehicle over the course of a road section, wherein the vehicle has applied coasting prior to this road section and wherein a highest permitted speed vis defined for the road section, below which an actual speed for the vehicle should be kept. A simulation of a future speed profile vfor a possible gear position for a gearbox in the vehicle is conducted on the basis of a road slope obtained from map data in combination with vehicle positioning information and wherein the simulation simulates, when the road section lies ahead of the vehicle, an actual speed for the vehicle over the course of the road section. Next, an evaluation is carried out of whether a suspension of the coasting in favor of the possible gear position is recommended, wherein the possible gear position is deemed recommendable if a highest value vfor the future speed profile exceeds the highest permitted speed v. The evaluation is then utilized in the choice of transmission mode.

Growing community of inventors

Segeltorp, Sweden

Fredrik Roos